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Upconversion luminescence of germanate nanophosphors activated by Er3+ and Yb3+ ions

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Abstract

The crystallophores of the composition Sr2La8(1x-y)ErxYbyGe6O26 (x = 0.01, 0.05, 0.075, 0.1, 0.15) were synthesized. Nanophosphores in the amorphous state were obtained for the first time by the method of pulsed electron beam evaporation using a phosphor of the composition Sr2La7.85Er0.075Yb0.075Ge6O26 with the structure of oxyapatites as a target. DSC-TGA analysis was performed to determine the temperature stability and the onset of crystallization of the nanosample. A change in the Raman spectra of the samples with a decrease in the particle dimension from the bulk to nanoscale state was found. The spectral characteristics of the upconversion photoluminescence of samples in polycrystalline and nano-amorphous states are studied. It has been shown that luminescence is influenced by nonradiative processes between different transitions of Er3+ ions. There is a threshold population of the Er3+ and Yb3+ levels (level 2F5/2) in the region of relatively low pumping powers of nanosamples by laser radiation with a wavelength of λex = 980 nm. Above this threshold a sharp increase in the intensity of upconversion photoluminescence occurs.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 91 Pervomaiskaya ul., 620990, Ekaterinburg, Russian Federation

    M. G. Zuev & A. A. Vasin

  2. B. N. Yeltsin Ural Federal University, 19 ul. Mira, 620002, Ekaterinburg, Russian Federation

    M. G. Zuev, S. Yu. Sokovnin, E. V. Batalova, E. A. Shebuhova & E. Yu. Zhuravleva

  3. Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, 106 ul. Amundsena, 620016, Ekaterinburg, Russian Federation

    V. G. Il’ves & S. Yu. Sokovnin

  4. Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, 20 ul. Akademiceskaya, 620137, Ekaterinburg, Russian Federation

    E. G. Vovkotrub

Authors
  1. M. G. Zuev
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  2. V. G. Il’ves
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  3. S. Yu. Sokovnin
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  4. A. A. Vasin
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  5. E. G. Vovkotrub
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  6. E. V. Batalova
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  7. E. A. Shebuhova
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  8. E. Yu. Zhuravleva
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Corresponding author

Correspondence to M. G. Zuev.

Additional information

This work was carried out in accordance with the state assignment of the Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences and plans for research and development.

Based on the materials of the XXI Mendeleev Congress on General and Applied Chemistry (September 9-13, 2019, St. Petersburg, Russia).

Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 0952–0957, May, 2020.

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Zuev, M.G., Il’ves, V.G., Sokovnin, S.Y. et al. Upconversion luminescence of germanate nanophosphors activated by Er3+ and Yb3+ ions. Russ Chem Bull 69, 952–957 (2020). https://doi.org/10.1007/s11172-020-2854-z

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  • DOI: https://doi.org/10.1007/s11172-020-2854-z

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